Variable-speed gearing.



Patented Aug. I2, 1902.

C. STONE,

VARIABLE SPEED GEARING.

(Applicntion filed Dec. 21, 1901) (No Model.)

WITNESSES! mysnron A TTOHNEY.

UNITED STATES PATENT OFFICE.

CLARENCE STONE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- IIALF TOALBERT R. GREVER, OF PHILADELPHIA, PENNSYLVANIA.

VARIABLE-SPEED GEARING.

SPECIFICATION forming part of Letters Patent No. 706,611, dated August12, 1902. Application filed December 21, 1901. Serial No. 86 ,758. (Nomodel.)

usefulImprovements in Variable-Speed Gear ing, of which the following isa full, clear, and exact description, reference being had to theaccompanying drawings, forminga part of this specification.

This invention relates to variable -speed gearing, my object being toprovide a simple and efficient construction and organization ofmechanism whereby a wide range of variation in speed may be readilyattained, as will be hereinafter particularly described and claimed.

In the drawings, Figure l is an end elevation of my improved gearing, apart of one of the friction-wheels being broken away. Fig. 2 is alongitudinal vertical section, as on the line 2 2 of Fig l. Fig. 3 is adetail of the ad- 3' ustable friction-disk.

A representsa hanger, and B acountershaft journaled therein and drivenfrom a suitable source of power- On this shaft is loosely mounted apulley O, (or other transmitting device,) on one side of which; concentrio therewith, is affixed a'spur-wheel D. 00-

acting with the teeth of this Wheel are pinions E, which are carried bystud-shafts F, having their bearings in a supporting-wheel G, keyed onthe counter-shaft. The stud-shafts also carry spur-wheels H, which gearWith a pinion I, formed on the hub of a friction-wheel J, that isloosely mounted on the countershaft, the said wheel and pulley thusbeing connected by planetary gearing. On the shaft 13 is keyed a largespur-wheel K, which gears with a pinion L on the outer end of astud-shaft M, having its bearings in the hanger on a plane beyond theperiphery of the friction-Wheel. This stud-shaft carries on its innerend a friction-wheel N. Acting on the opposing faces of the twofrictionwheels is a friction-disk 0, having provision for its radialadjustment in respect to such faces, as follows: The disk is looselymount ed on a vertical shaft P, which is supported at its respectiveends in the hanger. The hub of the Wheel is circumferentially groovedtoreeeive the U-shaped extension q of a nut Q, which is applied to aVertically-disposed screw R, journaled at its ends in the hanger. Thelower end of this screw is provided with a milled head S, wherebythescrew may be readily turned in eitherdirection to adjust the nut upor down thereon, and thus corre' spondingly move the disk along theshaft P.

In the presentinstance the stud-shaft M, carrying the wheel N and pinionL, is longitudinally movable .in its bearing, and a springpressedstud'm, supported in a laterally-disposed bracket m on,the hanger bearscentrally against the opposing end of the stud in a manner to press thelatter yieldingly inward, and thus maintain the said wheel against thefriction-disk.

The operation is as follows: Assuming the counter-shaft to be driven,the wheel G, revolving therewith, will rotate the shafts F and the gearsthereon about the axis of the counter-shafts. The pinions will roll uponthe spur-wheel D of the pulley, and therefore if such pinions berevolved about their own axes the said spur-wheel, and perforce thepulley, will be rotated thereby, the speed of the pulley being governedby the axial speed of rotationfof the pinions. Such rotation of thepinions is effected and eontrolledby the action upon the spur-wheels Hof the pinion I of the friction-wheel J, the speed of the spurwheelsbeing increased or diminished accordingly as the speed of the pinionsmay be varied. The power is positively transmitted from thecounter-shaft, through the gears K and L, to the friction-Wheel N, andthence through the diskO to the friction-wheel J,

carrying the pinion I. It follows, therefore, that as the said, disk isadjusted from or toward the axis of the wheel N the speed of the Wheel Jis varied, thereby regulating to a nicety the speed of the pulley.

I claim-- 1. In a variable-speed gearing, the combination with apower-shaft and a pulley thereon, of a friction-Wheel on said shaft,planetary gearing between said wheel and pulley, a secondfriotionwvheel, gearing between the latter and the counter-shaft,-afriction-disk interposed between the faces of said frictionwheels, andmeans for adjusting said disk radially in respect to said wheels,substantially as described.

2. In variable-speed gearing, the combination with a power-shaft and apulley thereon, of a gear-wheel on said pulley, pinions c0- acting withsaid gear-wheel, and shafts for said pinions, a support for saidstud-shafts aflixed to the power-shaft, spur-wheels on said stud-shafts,a friction-wheel loose on the power-shaft, the hub of said wheelincluding a pinion in gear with the spur-wheels last named, a spur-wheelfast on the power-shaft,

a pinion in gear therewith, a shaft for said pinion, a friction-wheel onthe latter shaft, a

friction-disk interposed between the faces of said friction-wheels, andmeans for adjusta ing said disk radially in respect to said wheels,

substantially as described.

CLARENCE STONE.

Witnesses ANDREW V. GROUPE, JOHN R. NOLAN.

